Charcoal-kiln



W A. MILES. Charcoal-Kiln,

No.22 5,296. Patnted Mar. 9,1880.

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UNIT D STATES PATENT OFFICE.

WILLIAM A. MILES, OF OOPAKE IRON WORKS, NEW YORK.

CHARCOAL-KILN.

SPECIFICATION forming part of Letters Patent No. 225,296, dated March 9, 1880,

Application filed September 10, 1877.

To all whom it may concern Be it known that I, WILLIAM A. MILES, of Copake Iron Works, Columbia county, New York, have invented new and useful Improvements in Charcoal-Kilns; and I do hereby declare that the following is a full and exact de scription of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

This invention consists, mainly, in'providing a kiln of suitable construction with a proper discharge opening at its lower end adapted to permit the removal of the finished charcoal, and a proper supply-opening at its upper end adapted to permit the introduction of fresh supplies of wood, by means of which the kiln is made continuous in its operation.

In the drawings, Figure 1 represents a side elevation of my improved kiln; Fig. 2, a central vertical sectional elevation, and Fig. 3 a partial plan view, of the same.

To enable others skilled in the art to make and use my invention, I will now proceed to describe fully its construction and manner of operation.

A represents the kiln, which may be constructed generally in the usual well-known or any other proper manner, but is preferably extended in avertical direction to obtain greater height than usual, as shown.

a (I. represent openings at the bottom of the kiln, by means of which a cart or other receptacle for the charcoal may be placed below.

the discharge-opening of the kiln, hereinafter referred to.

a a represent proper openings in the top of the kiln, through which the wood may be in troduced and the fire lighted.

a. a represent proper doors, by means of which these openings may be tightly closed when desired.

B represents a wrought or other metal piece, consisting preferably of an inverted hollow frustum of a cone with double walls, which is built into the kiln near its lower end, for the purpose of serving as a dischargechute.

1) represents an air-sup ply pipe, communicating at one end with a blower or other proper apparatus for forcing air, and at the other with the interior chamber, 00, of the casting B, as shown.

b represents a corresponding pipe, opening at its lower end into the chamber mof the casting B, which extends tipward to the annular pipe b, surrounding the kiln hear its upper end, as shown.

b b represent a series of bi anch pipes leading from the annular pipeb into the kiln, each of which is provided with a proper regulatingcock, b as shown.

C 0 represent doors of any proper construction, by means of which the upper opening into the chute or casting B may be closed, or partially closed, if desired. These doors consist, preferably, of semicircular flaps c, secured to the centrally-located transverse shaftsc c,

the ends of which latter extend through the walls of the kiln, and are provided with counterbalance-weights c 0 serving ordinarilyto hold them in a closed position.

D D represent doors of any proper construction, by means of which the lower opening of the chute is closed. These consist, preferably, of rectangular flaps adapted in size to close the discharge-opening of the chute, having corresponding form, which are provided with counterbalance-weights d d, serving ordinarily to hold them in a closed position.

E represents an annular pipe surrounding the kiln some distance below the similar pipe I), which communicates with the interior by a system of branch pipes, e 6, having proper is admitted, through the pipe 1), casting B,

and pipes 12 b N, to the interior of the kiln. By means of the incoming air-current the smoke and products of combustion are forced through the pipes e E e to the condenser, where the valuable portions are secured.

When the proper result has been obtained, this being known by practice and the usual indications, the lower doors of the chute are opened and the charge contained therein discharged into a cart or other proper receptacle.

These doors then being closed, the upper doors of the chute are. opened to permit a second charge to descend into the chute. The upper portion of the kiln is then provided with fresh supplies of wood.

As the charcoal descends the fire descends with it, but again works its wa up toward the line of.the air-inlets, this being its constant tendency. The charcoal received into the chute is there held until it becomes partially cooled, this result being hastened by the action of the air-current passing about the chute.

If desired, water also may be introduced in place of the air to hasten the cooling action. When the water is introduced the active airblast, of course, is suspended.

The operation of the kiln, it will thus be understood, is continuous, the finished charcoal being removed at intervals from the bottom and fresh supplies of wood inserted at the top.

It will be observed that the air-inlet is located above the smoke-outlet, from which arrangenlent it follows that the fire remaining This specification signed and witnessed this 16th day of August, 1877.

WILLIAM A. MILES.

Witnesses:

WILLIAM WRIGHT, G. A. DEANE. 

